Abstract
DDE in concentrations of 10 and 40 p.p.m. in the feed of penned mallards induced significant eggshell thinning and cracking and a marked increase in embryo mortality. DDD and DDT impaired reproduction, but less severely than DDE, a widespread breakdown product of DDT.
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HEATH, R., SPANN, J. & KREITZER, J. Marked DDE Impairment of Mallard Reproduction in Controlled Studies. Nature 224, 47–48 (1969). https://doi.org/10.1038/224047a0
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DOI: https://doi.org/10.1038/224047a0
